Portage A&P 2 Exam 1

A neuron going to the bicep of the forearm is part of the:

• A. Central nervous system

• B. Peripheral nervous system

• C. Autonomic system

• D. Somatic system

• F. B&D

An afferent neuron carries information:

• From the central to the peripheral nervous system

• From the peripheral to the central nervous system

• Within the central nervous system

• Within the peripheral nervous system

A presynaptic neuron would be found:

• Before the synapse

• After the synapse

• Inside the synapse

  
  

• Only in the peripheral nervous system

At rest, a neuron plasma membrane is:

• 0 mV

• +40 mV

• Polarized (around -70mV)

• Depolarized

Which of the following is false concerning the sodium-potassium pump?

• It maintains the resting phase of an axon.

• For every three sodium ions pumped out, two potassium ions are pumped in.

• It must remain in constant operation to maintain the resting state.

• The overall effect is a negative charge on the outside of the membrane.

Tags

NGSS.HS-LS1-3

True or false: A sensory neuron is signaling the body of extreme pain. This means that the strength of the action potential is greater than usual.

• TRUE

• FALSE

Which of the following statements is true concerning the neuromuscular junction?

• The NMJ terminates on neurons within the brain and spinal cord.

• The NMJ terminates on a muscle fiber.

• The NMJ terminates on a presynaptic motor neuron.

• The NMJ does not have a synapse.

True or False: Reflexes occur only with conscious intervention from the brain.

• True

• False

Which of the following statements is false about reflexes?

• Reflexes do not require higher levels of voluntary processing from the brain.

• Regulation of blood sugar by hormones is one example of a reflex.

• Some reflexes can be tested to determine injury.

• Pulling a hand away from a hot flame is not a reflex; it is entirely voluntary.

What is true about the stretch reflex?

• Stretch reflexes help to increase the stretch on a muscle.

• The patellar reflex tests the stretch reflex of the patella.

• The muscle spindle detects stretch within the muscle.

• The effect of the motor signal is to relax a muscle.